Circumferentially distributed thrust type tire removing apparatus



Aug. 8, 1950 R. F. DAW ETAL 2,518,125

CIRCUMFERENTIALLY DISTRIBUTED THRUST TYPE TIRE REMovING APRARATUS j THRUST .Our presenttinren .ion-relates nod apparatus for separating pneumatic tires fromVIA wheels, particularly. from wheelsl of the typexused onaircraft and'relates morefioertienlnrlyte ,the separation orgrernoval of ftire shoes orcoversjfrom wheels ofthe tvnehnvine an inolnesftire bead seating surface yand a, tire, retaining .nenne in: tegral with the body on one side thereof,the other Side ofthe wheel body., being .provided ,with en inside tire seatingsurface of aretaining flange Reginald Frank Daw, Harbourne, and ,I-IenryRay-l i 1 .r v vjmonrlFleteher, Wnrd End.- Englanlnssignors: f, w toDunlcp Tireand Rubber Corporation, Bduf; Y f v n l' l falo'N.Y.`, `a (iqrporation''of, NewYork e which may be; detachably-positionedhy a split look ring or otherentabledevieeg :1

.Dineulty has been. ,he,retoforeenenntered in separating 1 largen andheavy Vaircraft tiresrfrom whee1s of the Vabove type, owing `tothev very tight grip insured by the inclined tire bead seatingsurnl faces;4 When meehenienledevoes hevegbeen applied wthe .force Snoent to. overQenie-ftnetern oftthetire oonsidernbleldemese netsy .often been caused to the "metal of the wheel andtdthe beads of the tire, particularly f wheri; the wheel is composed of 'lightweight-metal" alloy.

Our present invention provides a method and apparatus for` separating a'tpneumatic tire shoe at. thel bead portion from a wheel,v orthe type having a'detacl'able tire"retainingfflarige vwith-f` out danger of injury either to the" e or to'tli'e Wheel. j 'LL Q In ouruinvention the wheel is placed with the detaehabIelnange downward-on; support-within the circumference of 4s adilange,.pressure-.is 'apl tire. remotea-,from said ange whereby the tire bead adjacent said wall is forced away from and freed from the rim of the wheel. The lower wall of the tire is supported on an annular support or cylindrical ring spaced about the flange support. The wheel is then lifted manually or otherwise from the detachable flange leaving the tire supported on the cylindrical ring. Downward pressure is then applied to the flange to free it from the tire bead seated thereon.

The supportingrings for the wheel and for the tire are supported on a base having a pedestal mounted thereon with a part positioned to register with the bore'of the wheel. A pillar or shaft is secured in a vertical'position in a central recess of the pedestal and axially of the supporting rings, and it may carry alternatively either one of two thrust members which may be moved axially on the shaft or pillar. One of the thrust members has a circular Arim positioned to apply pressure downwardly to the tire on the wheel. The other thrust member has a circular rim positioned to register with the rim of the detacha- I .-Applicatiomoetoberrza1946,.seria1N0.--706,47s i f.. l, -.InGl':eatBritain Novemberl1, 1945y z, f' g ri g.A These thrustvmembersmay be lmovedfby,a-

nut-:threaded ontojthe piller 'or Shaft.;

- 1 The.-ver,ous ,feeturesof our invention are. illus,k

trated, by way of example, in the accompanying dawlns. in .v i'. .p .Fisnl rse vertical Sectional View of annotare.- tue. embodying@ preferred form ,of the .invention es.. arrangedforf. kserenatine the e bead. of .the .f tire. ffonrthe flengelof .thevwneelopposite the der; tachablehanger` and Fig. 2, is a similarv sectional View 0f thopapnaratus. nrraneeda-l for Avseparating tinetre beedearred'on the detachable tire'anee;l after ,re.Hirn/a1..of.thefwneel-fY t ...ne 1111.1.Strnteot` in tneeeoomloanvine drawings, the apparatus 1 `comprises two cylindrical metal; rinse I. .and 2 ioositioned oonoentrieally to. sirio.-` port awheel Send tire 4 respectively-Mine exis oftherineswlend 2y is a redestall secured orra base plate 6 ion whichfgtheringsare., alsoA7V mounted. A vertical shaft Ior pillar 'Lis mounted;

in the pedestal 5 andisseoured there.iin-lovnearingv of a pin B which passes-through holes in ,th metal ping.; is; tnreadedat its. A111oper-er1c1.4 may .be provided with a lcircular platef ftggft withinthe boreofthe wheel` and center tliezwheel with respect to therings-I `and 21.

. ,we- Q, T Iheslpillar serves; to` guide.,alternativelygtwof thrust irnernbersa comprising arms. I 0. andfflnonf hubsl II and II slidable on the pillar 1 and car'- rying at their outer lower ends the rings I2 and I3 respectively in an axial position to the axis of the pillar l. As illustrated the arms IIJ preferably extend downwardly and outwardly.

As shown in Fig. lfthe diameter of the ring I2 is somewhat greater than the outer diameter of the non-separable retaining ange I4 which is integral with the wheel body.

As shown in Fig. 2 the outside diameter of the ring I3 is somewhat smaller than the bead diameter of the tire and is stepped to register with and locate itself upon the tapered extremity or end of a detachable tire retaining flange I5. The flange I5 has a channel I6, Fig. 1, for a retaining locking ring, the locking ring being removed however before the tire is to be separated from the wheel.

A nut I1 may be threaded onto the pillar 'I above the hubs II and II' respectively and is provided with arms I8 so that it may be readily rotated or threaded onto the pillar 'I to exert a pressure on the arms I 0 and I0'.

a horizontal position with the undermost extremity of the wheel rim in contact with. the inner metal ring I, the detachable flange I being underneath and the wheel body uppermost. Care must be taken to see that the inner metal supporting ring I is located to contact only with the rim of the wheel body internally vof the detachable flange in order that suchl supporting ring shall not overlap the smaller extremity ror rim of the detachable tire ange I5V Whih. must, be allowed full freedom for its ultimate displacement in a downward direction between the metal rings.

The outer metal ring 2 which is of somewhat'` greater height than the inner ring I contacts with the tire wall adjacent the bead at a diameter slightly greater than the overall diameter of the detachable tire retaining flange I5. Separation of the wheel from theftire may then be effectedy completely without needforl further handling of A;

the tire.

The 'rst stage of separation-is effected byplacing the larger thrust member on the side of the tirelremote from the detachable ange with its-circular rim If2 restingon the tire wall around the tire retaining flange |14 integralY with the upper end of the wheel body as shown in Fig. 1. The -threaded shaft 1 is then slid downward through vthe Xhub `of the thrust member and through the wheel body, and is locked non-rotatably in the pedestal in the base plate by inserting the pin 8. The nut I'I with its arm I8 extending radially therefrom is then threaded upon the pillar and rotated thereon-relative to` the -thrust member -until the downward pressure oftheV nut on the upper end of the hub- I I of `the thrust member forces the vuppermost tire Abead I9 oir its seat on the wheel body. v

-A'Io completev the first stagev of separation the locking pin 8 is withdrawn from the pillar and pedestal', after which the pillar 'I and nut II are removed'. The larger thrust member is then moved aside o the tire wall, after which the Wheel' body 3 is raised by manual -or-cthervmeans and removed and the inner tube 2|k is alsov removed'. The tire cover I4A then remains supported by-theouter metalring A2 but isstill secured byits;

remaining bead- 20 to the detachable flange I5 which overhangs the annular space between the metal rings I and 2 as shown in Fig. 2.

The second stage of separationishoyvn in Fig. 2 is effected: by 'inserting-the rim I3. of. thel smaller thrust member throughthe uppermost tire bead and lowering such smaller thrust member until its rim rests upon and registers upon the upstandng smaller extremity of the detachable tire retaining flange I5 carrying the remaining tire bead 20. The pillar 1 is inserted through the hub ofthe smaller thrust member and locked by the pin-f8 to the rpedestal of the base plate after which the nut II isagain rotated by the arms I8 upon the threaded 'pillar in contact with the hub of the smaller thrust member until the removable flange I5:` is vpressed off the remaining tire bead 20 and into the annular space between the metal rings `I` and 2, thus completing the separation of both beads of the tire from the wheel.

Having described-our inventionfwhat we claim is:

l. 'Apparatus for separating the 'beads of Aa pneumatic-tire yfrom awheel of the type having a detachalle'tire retaining flangefwhich comprises.

a supporting base having a central 'vertical pillar, means `on said pillar for centering a tire'Y wheel thereon, ya 'pair of rings on said basey concentric *with said pillar, one of said rings being positioned'tosupport said' wheeland the other of'` saidV rings to supporta `tire beyond and immediately adjacent the rim of said wheel and means' guided by said-pillar for applying pressure downwardly about `the circumference of lsaid wheel Ato theI tire wall uppermost when resting onsaidi rings.

2. The apparatus of'claim 1 in whichsaidipil-v larv is'threadedat its uppers/endr and is 'provided REFERENCES errangy The following .references are` of record in thel 111e Of. thispatent: A y

UNITED STATES PATENTS Number AName Datev '1,481,061 Hunter Jan.v l5, '1924 1,564,496l -Staugaard v Dec; 8; '1925 

